Startling new research released by the Drug-Induced Liver Injury Network reveals that your diet supplements could be making you sicker, not healthier like you had hoped.

According to the data, dietary supplements account for nearly 20% of drug related liver injuries that end up in hospitals.

Among the greatest offenders are bodybuilding supplements and green tea extract.

“We're seeing an increase in this very severe type of liver injury which can leaded to need for liver transplant or even death,” says Dr. Roshini Raj, an assistant professor of medicine at NYU Medical Center.

While these cases are relatively rare, they are not impossible, she stresses.

“I think what Americans need to realize, these dietary supplements—some of which have vitamins, body building supplements, diet pills that are not prescription—these are not regulated by the FDA.”

Dr. Raj explains that virtually anyone can create a substandard supplement and sell it, and it’s not easily distinguishable which supplements are safe if no one is testing them.

“The FDA only looks at these types of supplements if there had been adverse events already reported. And by the way, it’s up to the manufacturer to really report them.”